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Finding the Fourth Proportional to 817,804.80, 1,226,707.20 and 256,838.40

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Solution

The fourth proportional to 817,804.80, 1,226,707.20 and 256,838.40 is: 385,257.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,804.80 : 1,226,707.20 = 256,838.40 : x
  2. Step 2: Convert to fraction form
    817,804.80/1,226,707.20 = 256,838.40/x
  3. Step 3: Cross multiply
    817,804.80x = 1,226,707.20 × 256,838.40
  4. Step 4: Simplify right side
    817,804.80x = 315,065,514,516.48
  5. Step 5: Solve for x
    x = 315,065,514,516.48/817,804.80
  6. Step 6: Final answer
    x = 385,257.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.